Photoperiodic regulation of seasonal reproduction in higher vertebrates
S Rani, V Kumar - 2014 - nopr.niscpr.res.in
Long-lived animals such as birds and mammals adapt readily to seasonal changes in their
environment. They integrate environmental cues with their internal clocks to prepare and …
environment. They integrate environmental cues with their internal clocks to prepare and …
The bird clock: a complex, multi-oscillatory and highly diversified system
V Kumar, BP Singh, S Rani - Biological Rhythm Research, 2004 - Taylor & Francis
A clock is conceptualized as comprising an input-pacemaker-output system. An overtly
measured output, such as the rhythm of activity, feeding or secretion of melatonin, is the …
measured output, such as the rhythm of activity, feeding or secretion of melatonin, is the …
Light spectrum and intensity, and the timekeeping in birds
The important aspect of light environment is to provide time-of-day and time-of-year
information to the endogenous machinery that measures time. In a 24 h day there are …
information to the endogenous machinery that measures time. In a 24 h day there are …
Wavelength Dependency of Light-Induced Effects on Photoperiodic Clock in the Migratory Blackheaded Bunting (Emberiza melanocephala)
The effects of light wavelength on photoperiodic clock were determined in the migratory
male blackheaded bunting (Emberiza melanocephala). We constructed an action spectrum …
male blackheaded bunting (Emberiza melanocephala). We constructed an action spectrum …
Hypothalamic molecular correlates of photoperiod-induced spring migration in intact and castrated male redheaded buntings
This study investigated the molecular changes associated with neural plasticity in
photoperiodic induction of spring migration in intact and castrated redheaded bunting …
photoperiodic induction of spring migration in intact and castrated redheaded bunting …
Neural Correlates of Migration: Activation of Hypothalamic Clock(s) in and out of Migratory State in the Blackheaded Bunting (Emberiza melanocephala)
Background Many vertebrates distinguish between short and long day lengths using
suprachiasmatic nuclei (SCN). In birds particular, the mediobasal hypothalamus (MBH) is …
suprachiasmatic nuclei (SCN). In birds particular, the mediobasal hypothalamus (MBH) is …
Regulation of seasonality in the migratory male blackheaded bunting (Emberiza melanocephala)
M Misra, S Rani, S Singh… - Reproduction Nutrition …, 2004 - rnd.edpsciences.org
The present study was carried out on a Palearctic-Indian migratory species, the
blackheaded bunting (Emberiza melanocephala), to understand the importance of …
blackheaded bunting (Emberiza melanocephala), to understand the importance of …
Seasonal alterations in the daily rhythms in hypothalamic expression of genes involved in the photoperiodic transduction and neurosteroid‐dependent processes in …
The present study investigated seasonal alterations in the daily rhythms of hypothalamic
expression of genes involved in the photoperiodic regulation of annual cycles in birds. We …
expression of genes involved in the photoperiodic regulation of annual cycles in birds. We …
Concurrent hypothalamic gene expression under acute and chronic long days: Implications for initiation and maintenance of photoperiodic response in migratory …
Hypothalamic expression of the thyroid hormone (TH) responsive gonadostimulatory (eya3,
cga, tshβ, dio2, dio3, gnrh, gnih) and neurosteroid pathway genes (androgen receptor [ar] …
cga, tshβ, dio2, dio3, gnrh, gnih) and neurosteroid pathway genes (androgen receptor [ar] …
Temporal expression of c-fos and genes coding for neuropeptides and enzymes of amino acid and amine neurotransmitter biosynthesis in retina, pineal and …
This study investigated whether, in photoperiodic songbirds, the circadian pacemaker
system (CPS) connects to the seasonal photoperiodic responses, by changes at …
system (CPS) connects to the seasonal photoperiodic responses, by changes at …